Journal of urban health : bulletin of the New York Academy of Medicine
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No known studies have examined the relationships between urban heat islands, historic redlining, and neighborhood walking in older adults. We assessed whether (1) individual and neighborhood characteristics (including redlining score) differ by neighborhood summer land surface temperature (LST); (2) higher LST is associated with less neighborhood walking, and whether associations differ by historic redlining score; and (3) neighborhoods with discriminatory redlining scores have greater LSTs. We used data on 3982 ≥ 65 years old from the 2017 National Household Travel Survey. ⋯ Overall, these findings suggest that historically redlined neighborhoods may experience urban heat island effects more often. While older adults living in hotter neighborhoods with "still desirable" or "best" redlining scores may less often engage in neighborhood walking, those in neighborhoods with redlining scores of "definitely declining" and "hazardous" do not seem to decrease neighborhood walking with higher LSTs. Future work is needed to elucidate the impact of extreme heat on health-promoting behaviors such as walking and the types of interventions that can successfully counteract negative impacts on historically disadvantaged communities.
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Highway reclamation (i.e., the removal of highways or placing existing highways underground to create mixed-use urban areas) is being implemented around the United States, often touting co-benefits for population health. As part of the Bipartisan Infrastructure Law and the Inflation Reduction Act, the Reconnecting Communities and Neighborhoods grant program is a first-of-its-kind investment in launching even more highway reclamation projects. ⋯ However, little work has systematically examined the extent to which highway reclamation projects provide the promised benefits for neighborhood environments (e.g., reduced air pollution), minimize gentrification, and improve health outcomes. This commentary proposes a framework by which the multidimensional impacts of highway reclamation can be evaluated, unlocking potential new structural pathways toward urban health equity.
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According to the Global Food Policy Report 2017, nearly 90% of the projected urban population increase by 2050 is going to be concentrated in Africa and Asia. Parallel evidence suggests that poverty and related challenges of food insecurity and undernutrition are also urbanizing. The dynamics underlying urban nutrition is different from rural ones but also arguably represents a more complex scenario. ⋯ Noticeably, this literature also draws upon successful interventions having implications for urban nutrition. Finally, the review identifies a few research gaps that hinder a holistic view of urban nutrition. These gaps pertain to gender, equity, water (along with sanitation and hygiene), and local governance.
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We investigated whether neighborhood greenspaces were associated with physical activity in adulthood over 3 cohort visits after considering perceived safety and neighborhood contextual factors. We also evaluated whether the association with greenspace varied by neighborhood socioeconomic status. Participants (N = 4,800) from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) residing in two Brazilian state capitals were evaluated in Visits 1 (2008-2010), 2 (2012-2014) and 3 (2017-2019). ⋯ After adjustment for contextual factors quantity of sidewalks and streetlights, the OR for the 4th and 5th NDVI quintiles decreased to 1.66 (95%CI = 1.18-2.33) and 1.62 (95%CI = 1.16-2.28), respectively. Finally, after including average household income per capita, the OR for physical activity in 3 visits for the 4th and 5th NDVI quintiles decreased to 1.48 (95%CI = 1.04-2.12) and 1.43 (95%CI = 1.00-2.04; p = 0.053), respectively. Greater greenspace contributed to sustained physical activity during the eight years of follow-up, indicating the potential contribution of public greenspaces to reducing health-related inequalities.
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Understanding how urban environments shape physical activity is critical in rapidly urbanizing countries such as South Africa. We assessed the reliability of virtual audits for characterizing urban features related to physical activity in Soweto, South Africa. We used the Microscale Audit of Pedestrian Streetscapes Global tool to characterize pedestrian-related features from Google Street View images in four neighborhoods of Soweto. ⋯ Many measurements however generated inconclusive results due to either low variability in the raters' responses or the absence of the features in the streets. It is evident from our findings that virtual audits are efficient tools that can be used to assess the built environment. However, to ensure meaningful use of these tools in diverse settings, we recommend that auditors comprise of people with contextual familiarity.